tomato plant experiment manipulated variable

She then sealed the plants in plastic bags.

What was the independent and dependent in the experiment? This educated guess is about the relationship between the independent and dependent variables.

Scientific Method - Manipulated and Responding Variables. In a properly designed experiment, there will be only one manipulated variable. Plant A is exposed to classical music using headphones attached to the soil. In the example above, if some of the plants were sitting closer to the window than others, the differential exposure to light could be affecting the number of days to flowering, rather than the volume of water.In the Seed Investigation, students investigate the germination rates of tomato seeds that have been to space (or exposed to space-like conditions) with seeds that have remained on Earth.Have students read the following questions and determine the independent, dependent and potential controlled variables.In their own words, have student define the terms “Independent variable,” “Dependent variable,” and “Controlled variable.”Have the students brainstorm the variables that should be controlled in the Seed Investigation (e.g., quantity of water, type of soil, type of planting container, temperature, etc. 8) Tina’s experiment should have included a hypothesis. The experimental group was fertilized consistently with a two mixtures one consisting of water and molasses and one consisting of urine and molasses, while the control group received no form of fertilization. In all trials of the experiment, the plant with added chemical fertilizer produced the tallest plants. The Effect of Fertilization on Tomato (Height) Growth The purpose of this experiment was to find what effect fertilization has on a tomato’s growth height wise. Independent Variable - The part of the experiment that is manipulated or changed by the scientist or person performing the experiment.Scientific Method - Manipulated and Responding Variables... Give each group a scenario and ask them to design an experiment! Quiz questions will test your understanding of which variable is changed on purpose in an experiment and recognizing how a ...Scientific Method - Manipulated and Responding Variables Practice identifying variables in an experiement by reading stories about science fair projects. In Trials 2 and 3, the plants with added organic fertilizer were the shortest, which might indicate that the effect of coffee ground (organic fertilizer) on tomato plants was that it decreased growth rate.

These factors that must be kept the same are called the A failure to control variables other than the independent variable will mean that you will not know which factor is actually causing the effects you see. The tomato hypothesis: soda will grow the tallest tomato plants. Its that easy! In Test 2, she places a few drops of caffeine on the earthworm’s skin and measures the rate again. Data was collected weekly for 10 weeks by measuring the plants and marking down any notable changes such as formation of flowers as well as any fruit that was produced. In the salt and water experiment, for example, the manipulated variable is the amount of salt added to the water. To become a pro, follow along the PowerPoint with your notes, filling in when needed.

This worksheet can also be used as an assessment to determine understanding about the scientific method.The change in their mass is measured after a day. Independent Variable: The addition of the different kinds of fertilizer to the soil of newly planted tomato seeds ( organic/chemical) Dependent Variable: The height of the plants is measured.

The independent variable for this experiment was the type of fertilizer with the dependent variable being the tomatoes growth in height. In the salt and water experiment, for example, the manipulated variable is the amount of salt added to the water. At the end of each week, the height of each plant was measured. The experimental group was fertilized consistently with a two mixtures one consisting of water and molasses and one consisting of urine and molasses, while the control group received no form of fertilization. The control group was strictly watered while the experimental group received a portion of the fertilizer solution in addition to the water, until week five where the plants no longer received more fertilizer.

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